Question

Ecuaciones Lineales

X-12+5x=42+2x+4

3x-x=-2x+40

5x+x-70=.22-2x+40

5.8x-12.7=2x-22.6​

Answer 1

Respuesta:

$x - 12 + 5x = 42 + 2x + 4 \\ 6x - 12 = 46 + 2x \\ 6x - 2x = 46 + 12 \\ 4x = 58 \\ x = \frac{58}{4} \\ x = \frac{29}{2}$

$3x - x = - 2x + 40 \\ 2x = - 2x + 40 \\ 2x + 2x = 40 \\ 4x = 40 \\ x = 10$

$5x + x - 70 = 22 - 2x + 40 \\ 6x - 70 = 62 - 2x \\ 6x + 2x = 62 + 70 \\ 8x = 132 \\ x = \frac{132}{8} \\ x = \frac{33}{2}$

$5 \times 8x - 12 \times 7 = 2x - 22 \times 6 \\ 40x - 84 = 2x - 132 \\ 40x - 2x = - 132 + 84 \\ 38x = - 48 \\ x = - \frac{48}{38} \\ x = - \frac{24}{19}$